<template>
   <div>
    <el-tree
  :props="props"
  :load="loadNode"
  lazy
  @node-click="clickHandle"
  >
</el-tree>
   </div>
</template>

<script>
  export default {
    data() {
      return {
        props: {
          label: 'name',
          children: 'zones',
          isLeaf: 'leaf'
        },
      };
    },
    methods: {
      clickHandle(data){
        
        this.$emit('sendetreedata',data)
      },
      loadNode(node, resolve) {
        if (node.level === 0) {
          return resolve([{ name: 'region' }]);
        }
        if (node.level > 1) return resolve([]);

        setTimeout(() => {
          const data = [{
            name: 'leaf',
            leaf: true
          }, {
            name: 'zone'
          }];

          resolve(data);
        }, 500);
      }
    }
  };
</script>

<style>

</style>